Constant-pressure drop filtration can result in saturation or blockage of the filter medium. The network of pores within the filter medium can become blocked because of one or a combination of the following situations:
• Pores may become blocked by the lodging of single particles in the pore passage.
• Gradual blockage can occur due to the accumulation of many particles in pore passages.
• Blockage may occur during intermediate-type filtration.
Proper filter medium selection is based on understanding these mechanisms and analyzing the impact each has on the filtration process.
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